<template>
  <div v-if="value || show">
    <transition name="modal">
      <div class="modal-mask">
        <div class="modal-wrapper">
          <div class="modal-container">
            <div class="modal-header">
              <slot name="header">default header</slot>
            </div>

            <div class="modal-body">
              <slot name="body">{{ message }}</slot>
            </div>

            <div class="modal-footer">
              <slot name="footer">
                default footer
                <button class="modal-default-button" @click="handleClose">OK</button>
              </slot>
            </div>
          </div>
        </div>
      </div>
    </transition>
  </div>
</template>

<script>
export default {
  props: {
    value: {
      type: Boolean,
      default: false
    }
  },
  data () {
    return {
      show: false,
      message: '',
      resolve: null,
      reject: null
    }
  },
  methods: {
    handleClose () {
      // 关闭标签方式的
      this.$emit('input', false)

      // 关闭js方式的
      this.show = false

      // 关闭
      this.reject()
    },
    showBox () {
      this.show = true

      return new Promise((resolve, reject) => {
        this.resolve = resolve

        this.reject = reject
      })
    }
  },
  beforeDestroy () {
    console.log('---modal beforeDestroy---')
  }
}
</script>

<style>
.modal-mask {
  position: fixed;
  z-index: 9998;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: table;
  transition: opacity 0.3s ease;
}

.modal-wrapper {
  display: table-cell;
  vertical-align: middle;
}

.modal-container {
  width: 300px;
  margin: 0px auto;
  padding: 20px 30px;
  background-color: #fff;
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.33);
  transition: all 0.3s ease;
  font-family: Helvetica, Arial, sans-serif;
}

.modal-header h3 {
  margin-top: 0;
  color: #42b983;
}

.modal-body {
  margin: 20px 0;
}

.modal-default-button {
  float: right;
}

/*
 * The following styles are auto-applied to elements with
 * transition="modal" when their visibility is toggled
 * by Vue.js.
 *
 * You can easily play with the modal transition by editing
 * these styles.
 */

.modal-enter {
  opacity: 0;
}

.modal-leave-active {
  opacity: 0;
}

.modal-enter .modal-container,
.modal-leave-active .modal-container {
  -webkit-transform: scale(1.1);
  transform: scale(1.1);
}
</style>
